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Sistem Absensi Otomatis menggunakan Radio Frequency Identification berbasis Mikrokontroler ESP32 Kahar, Saipul; Thamrin, Thamrin
TSAQOFAH Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/tsaqofah.v5i4.6397

Abstract

This study stems from the need to improve the efficiency of student attendance recording in schools, which is still predominantly carried out manually and remains ineffective. The primary objective of the research is to develop an automated attendance system based on the ESP32 microcontroller, integrated with Radio Frequency Identification (RFID) technology and the Internet of Things (IoT) concept. The method employed is Rapid Application Development (RAD), which supports fast and iterative system design and testing. The system is built using key components such as the MFRC522 RFID reader, 16x2 LCD display, real-time clock (RTC), 4x4 keypad, buzzer, and I2C communication module, all integrated into a single automated attendance device. The software was developed using Arduino IDE for microcontroller programming and Visual Studio Code for the web interface, while the database was constructed using MySQL via XAMPP. Testing results indicate that all modules function optimally; the system accurately reads RFID UIDs, displays real-time attendance data on the LCD, and automatically stores information in the database. In conclusion, the system effectively replaces manual attendance methods and demonstrates high potential for broad implementation in educational institutions.
Rancang Bangun Trainer Televisi sebagai Media Pembelajaran Perawatan dan Perbaikan Peralatan Audio Video di SMK Negeri 1 Bukittinggi Prasetya, Muhammad Raga; Thamrin, Thamrin
TSAQOFAH Vol 5 No 5 (2025): SEPTEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/tsaqofah.v5i5.6840

Abstract

The use of practice-based instructional media in the subject of Audio Video Equipment Maintenance and Repair at vocational high schools (SMK) remains limited, particularly in providing tools that align with industry demands. This study aims to develop an LCD Television Trainer and Manual Book as practical learning media for vocational students. The research employed the Four-D (4D) development model, consisting of the Define, Design, Development, and Dissemination stages. The study involved 10 twelfth-grade students majoring in Audio Video Engineering at SMK Negeri 1 Bukittinggi. Data collection instruments included validity and practicality questionnaires administered to two lecturers and two teachers as validators, as well as to students as users. Data were analyzed using descriptive quantitative methods with a Likert scale. Validation results indicated a very high level of feasibility, with scores of 92.5% from content experts and 90% from media experts. Practicality testing by students yielded an average score of 92.6%, suggesting that the media are highly practical and effective for hands-on learning. The study concludes that the developed LCD Television Trainer and Manual Book are suitable for use as vocational learning media and contribute to improving the quality of skills-based education. The findings also highlight the potential for developing similar media in other technical fields and for digitalizing trainers to meet the demands of Industry 4.0.
Effect of Light Intensity on the Abundance of Zooxanthellae on Branching Corals (Acropora sp.) at Pagang Island Waters, West Sumatra Desnaldi, Muhammad Zikran; Thamrin, Thamrin; Siregar, Sofyan Husein
Journal of Coastal and Ocean Sciences Vol. 7 No. 2 (2026): May
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.7.2.119-125

Abstract

Zooxanthellae are symbiotic microalgae that live within coral tissue, playing a vital role in photosynthesis and providing energy to the coral through their metabolic products. Various environmental factors, including light intensity, can influence the abundance of zooxanthellae in corals. This study aimed to determine the abundance of zooxanthellae in branching corals (Acropora sp.) based on different light intensities and to analyze the effect of light intensity on the abundance of zooxanthellae in branching corals (Acropora sp.). This research was conducted in May 2025 at Pagang Island Waters, West Sumatra. The method used in this research is a field experiment. The coral colonies used in the research were assigned to 4 treatments to achieve different light intensities for the samples. The results of this study indicate that there are differences in the abundance of zooxanthellae in branching corals (Acropora sp.) based on different light intensities. The average abundance of zooxanthellae in treatment 1 (control = 694-702 µE/m2s) was 9,961,707 cells/cm2, in treatment 2 (200 µE/m2s) was 5,715,698 cells/cm2, in treatment 3 (100 µE/m2s) was 3,589,326 cells/cm2, and in treatment 4 (0 µE/m2s) was 1,530,447 cells/cm2. This study also shows a very strong relationship between light intensity and the abundance of zooxanthellae in branching corals (Acropora sp.).
Co-Authors . Zulfan A.A. Ketut Agung Cahyawan W Achmad Noerkhaerin Putra Adiyatma, Patwa Adni, Nailul Adriana, Alysa Adriani Susanty Afrizal Tanjung Agustiarmi, Winda Agustin, R. Sandra Albert Albert Albert Albert Ali Fikri Hasibuan Alit Hindri Yani Alpian Ambiyar, Ambiyar Anak Agung Istri Sri Wiadnyani Ananda, Nahdya Nasri Andi Taufiq Umar Andikha, Muhammad Imam Anori, Sartika Apdillah, Doni Aprinata, Rio Aras Mulyadi Arina Haque Ariusni Ariusni Artha, Dwirani Puspa Asih Kuswardinah Asrizal Ayunda, Fadhilah Putri Bambang Triatma, Bambang Batubara, Ummi Mardhiah Belilasari, Belilasari Bilhuda, Ulwatul Bintal Amin Can, Hafez Adefl Cantika, Aisyah Clara, Dina Harven Darmi, Darmi Darwin Yunus Defitra, Hersa Javayu Delsina Faiza Delvi, Kasma Muria Deni Efizon Desi Yoswati, Desi Desnaldi, Muhammad Zikran Dessy Yoswaty Deva Djohan Devia Febrina Dewita Dewita Dirmaningsih, Septi Dodi Irwan Siregar Driani, Gema Illahi Eddiwan Kamaruddin Efriyeldi, Efriyeldi Eko Wahyu Nugrahadi Elizal, Elizal Fachry Abda El Rahman Fadli, Mohamad Faiza, Deslina Fakri, Rangga Zaumil Farma, Elmi Aulia Fatmawati, Riska Febrianda, Farid Feliatra, Feli Ferdiansyah, Andika Fitri, Nurlaila Fitri, Nurlaili Fitria Arifin, Elfira Gafnie, Ghassani Razan Geovanne Farell Ginting, Twinta Dellanov Hadiyatma, Patwa Hakim, Sultan Ahmad El Hamidi, Wilzam Harahap, Fitri Annisa Harahap, Irawan Hasanah, Afifah Nur Helda Helda Hidayat, Aga Azmi Hidayatullah Ismail, Hidayatullah Husnawati Husnawati Ida Ayu Putu Sri Widnyani Ifdil Ifdil IKA PUSPA SATRIANNY Ince Raden Irvina Nurachmi irwan chairudin, irwan Irwan Effendi Irwan Limbong Izrawati, Izrawati Jamaludin . Joko Samiaji Julisa, Ulfania Julisa, Ulfilia Kahar, Saipul Khairi Budayawan Kuandi Chandra Kurniawan, Rika La Rianda Lieng, Lieng Lovanda, Andi Luthfiani, Firda M. Delpopi Manik, Pilipus Fiter Matondang, Ridwan Rafsyanjani Meddiati Fajri Putri Meiriza, Mica Siar Meridona, Meridona Mirad, Awis Mohd. Hatta, Mohd. Mubarak Mubarak Muchlis Muchlis Muhammad Edisar Muhammad Natsir Kholis Muhammad Rusdi MUHAMMAD YUSUF Muhson, Nanang Munajat Munajat, Munajat Murad, Auda Muttaqin, Moh Nabila Tasrif Nabilah, Zaimatun NANDA PRATAMA Naserd, Yolanda Febriani Ngazizah, Yeti Nur Nisa, Rahmiyatin Nofi Yendri Sudiar Nofrizal Nofrizal Nuraini Nuraini Nursamsi, Nursamsi Nursamsi, Nursamsi Nursyirwani, Nursyirwani Oktamelani, Aulia Oktapani, Silm Pakhrur Razi Pambudi, Bagas Ariya Paniska, Almaarif Prasadja Ricardianto, Prasadja Prasetya, Muhammad Raga Prasiska, Yulia Pratama, Bima Pratama, Farrel Primadi Candra Susanto Putri, Yolandha Rachmadi, Moch Faizal Raden Mohamad Herdian Bhakti RAHAYU, IFNALIA Rahma Lisya, Sri Rahman, Ana Septia Rahmiati Rahmiati Ramadhan Lubis, Rafi Ramses Firdaus, Ramses Rayhan Anugerah Hadikusuma Rery Novio Ridwan Manda Putra Rifardi Rizki, Nida Robin Robin, Robin Rohim, Mustofa Romie Jhonnerie Saidun Hutasuhut Sandi, Widya Ari Sari, Fifian Permata Sari, Yollit Permata Satriany, Ika Puspa Satyawira, Immanuel Grahan Deyon Sawitri, Nadia Sheanny Ocmi Sakti Shintya, Ellysa Siahaan, Vani Oktavia Sibarani, Choms Choms Gary Ganda Tua Sibarani, Choms Gary Ganda Tua Sidauruk, Shanty W Silaban, Santi Maria Simatupang, Wakhinuddin Siringo-ringo, Irpan suriadi Siringoringo, Frido S. Siti Aisyah Siti Fatimah Sitohang, Margaretha Sitohang, Margaretha Sri Ulina Siwi, Menik Kurnia Sofya, Rani Sofyan Husein Siregar Subarkah, Irham Sudjianto Sudjianto, Sudjianto Suharianto , Joko Sukendi Sukendi Sumarno . Suryadi, Gusnan Susanto, Riki Syafruddin Nasution Syahrul Syahrul Syaiful . Syoffnelli, Syoffnelli Syoffnelli, Syoffnelli Tamba, Iventura Tawa, Hasbi Tengku Nurhidayah Tri Kurniawati, Tri Triani, Mike ULWAN, NASEH Utama Ritonga, Fajar Utari, Vannesa Vera Irma Delianti Vivin Seygita, Vivin Wafa, Khairuw Wahyu, Rifkhan Wahyudi, Rido Wardana, Rangga Wira Noviana, Wira Noviana Yasin, Robiha Yeni, Isra Yohandri Bow Yosefa, Bella Yosi Pahala, Yosi Yuliana Yuliana Yusni Ikhwan Siregar Zhonada, Anggun Zulfikar, Andi Zulkarnain Zulkarnain Zulkarnaini Zulkarnaini Zulkifli Zulkifli